/*
silverPDF is sponsored by Aleyant Systems (http://www.aleyant.com)

silverPDF is based on PdfSharp (http://www.pdfsharp.net) and iTextSharp (http://itextsharp.sourceforge.net)

Developers: Ai_boy (aka Oleksii Okhrymenko)

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above information and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR SPONSORS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

*/
#region PDFsharp - A .NET library for processing PDF
//
// Authors:
//   Stefan Lange (mailto:Stefan.Lange@pdfsharp.com)
//
// Copyright (c) 2005-2008 empira Software GmbH, Cologne (Germany)
//
// http://www.pdfsharp.com
// http://sourceforge.net/projects/pdfsharp
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
#endregion

using System;
using System.Diagnostics;
using System.Globalization;
using System.Collections;
using System.Text;
using System.IO;
using PdfSharp.Internal;
using PdfSharp.Pdf.IO;

namespace PdfSharp.Pdf
{
  /// <summary>
  /// Represents a direct integer value.
  /// </summary>
  [DebuggerDisplay("({Value})")]
  public sealed class PdfInteger : PdfNumber, IConvertible
  {
    /// <summary>
    /// Initializes a new instance of the <see cref="PdfInteger"/> class.
    /// </summary>
    public PdfInteger()
    { }

    /// <summary>
    /// Initializes a new instance of the <see cref="PdfInteger"/> class.
    /// </summary>
    /// <param name="value">The value.</param>
    public PdfInteger(int value)
    {
      this.value = value;
    }

    /// <summary>
    /// Gets the value as integer
    /// </summary>
    public int Value
    {
      // This class must behave like a value type. Therefore it cannot be changed (like System.String).
      get { return this.value; }
    }
    int value;

    /// <summary>
    /// Returns the integer as string.
    /// </summary>
    public override string ToString()
    {
      return this.value.ToString();
    }

    /// <summary>
    /// Writes the integer as string.
    /// </summary>
    internal override void WriteObject(PdfWriter writer)
    {
      writer.Write(this);
    }

    #region IConvertible Members

    ulong IConvertible.ToUInt64(IFormatProvider provider)
    {
      return Convert.ToUInt64(this.value);
    }

    sbyte IConvertible.ToSByte(IFormatProvider provider)
    {
      throw new InvalidCastException();
    }

    double IConvertible.ToDouble(IFormatProvider provider)
    {
      return value;
    }

    DateTime IConvertible.ToDateTime(IFormatProvider provider)
    {
      // TODO:  Add PdfInteger.ToDateTime implementation
      return new DateTime();
    }

    float IConvertible.ToSingle(IFormatProvider provider)
    {
      return value;
    }

    bool IConvertible.ToBoolean(IFormatProvider provider)
    {
      return Convert.ToBoolean(this.value);
    }

    int IConvertible.ToInt32(IFormatProvider provider)
    {
      return value;
    }

    ushort IConvertible.ToUInt16(IFormatProvider provider)
    {
      return Convert.ToUInt16(this.value);
    }

    short IConvertible.ToInt16(IFormatProvider provider)
    {
      return Convert.ToInt16(this.value);
    }

    string IConvertible.ToString(IFormatProvider provider)
    {
      return value.ToString(provider);
    }

    byte IConvertible.ToByte(IFormatProvider provider)
    {
      return Convert.ToByte(this.value);
    }

    char IConvertible.ToChar(IFormatProvider provider)
    {
      return Convert.ToChar(this.value);
    }

    long IConvertible.ToInt64(IFormatProvider provider)
    {
      return value;
    }

    /// <summary>
    /// Returns TypeCode for 32-bit integers.
    /// </summary>
    public TypeCode GetTypeCode()
    {
      return TypeCode.Int32;
    }

    decimal IConvertible.ToDecimal(IFormatProvider provider)
    {
      return value;
    }

    object IConvertible.ToType(Type conversionType, IFormatProvider provider)
    {
      // TODO:  Add PdfInteger.ToType implementation
      return null;
    }

    uint IConvertible.ToUInt32(IFormatProvider provider)
    {
      return Convert.ToUInt32(this.value);
    }

    #endregion
  }
}